tobias wrote:Turn on the Crazyflie then start slowly moving it around. Connect to it and send me the same command prompt output. If the Y output still measures 0.0 then it is probably broken.

Could you try this and post the output. It's important that you start moving it just after you power it on.

... whether you mean to start moving it before or after the propeller check; tried it both ways; same fail. (Powered it up on level surface both times, then picked it up and moved it around while connecting.)

This began after an impact -- but not an exceptionally hard one. In fact, I'd been planning on posting my amazement at the punishment the CF can take when this happened.

Possibly have the same issue here.
My second CF was flying pretty well, but never was stable enough to hover in place. Specially when rising from ground it tend to rotate in one direction.
But today I hit it pretty hard and it felt from about 1,5m to concrete floor - seems well, but was not rising correctly, alway deviating to "front".

After power off-on sequence it won't start, flashes about 5 times in red all the time. Don't have CF here to check console now, but after reading this thread it can be broken gyro problem.

foosel wrote:I know you probably don't wanna hear this, but that sounds suspiciously like what mine did, except mine was drifting to the right before power-cycling.

Lucky me after my first pre-ordered CF came with possibly broken firmware (thread) I decided to buy two new kits. Luckily the third CF is still in a box, so in worst case I will have quite a lot "spare parts" for it